WO2020221253A1

WO2020221253A1 - Method executed by user equipment and user equipment

Info

Publication number: WO2020221253A1
Application number: PCT/CN2020/087523
Authority: WO
Inventors: 刘仁茂; 罗超; 赵毅男
Original assignee: 夏普株式会社; 刘仁茂
Priority date: 2019-04-30
Filing date: 2020-04-28
Publication date: 2020-11-05
Also published as: CN111865540A

Abstract

Provided in the present invention is a method executed by user equipment UE, comprising: receiving from a base station configuration information used for configuring a power saving channel for user equipment UE, the power saving channel being based on a physical downlink control channel PDCCH; on the basis of the received configuration information, determining that the power saving channel is a UE-specific PDCCH or a PDCCH common to a group of UE; if the power channel is a PDCCH common to a group of UE, on the basis of the received configuration information, determining the start position of the information domain of the user equipment UE in downlink control information DCI of the power saving channel and the number of bits occupied by said information domain in the downlink control information DCI of the power saving channel.

Description

Method executed by user equipment and user equipment

Technical field

This application relates to the field of wireless communication technologies, and more specifically, this application relates to methods executed by user equipment and user equipment.

Background technique

In March 2019, at the RAN#83 plenary meeting of the 3rd Generation Partnership Project (3rd Generation Partnership Project: 3GPP), a new work project on user equipment (UE) power saving (see RP-190727: New WID: UE Power Saving in NR) was approved. One of the goals of the above research project is to introduce a physical downlink control channel (Physical Downlink Control Channel, PDCCH) power-saving signal or channel to the UE in the radio resource control connection state (RRC_CONNECTED: Radio Resource Control_CONNECTED) to reduce the UE's energy consumption .

The present disclosure mainly solves the problems of PDCCH-based power saving signal or channel configuration and implementation.

Summary of the invention

In order to solve at least a part of the above-mentioned problems, the present invention provides a method and user equipment executed by a user equipment UE, which are used to solve problems such as the configuration and implementation of the power saving signal or channel based on the PDCCH.

According to one aspect of the present invention, there is provided a method performed by a user equipment UE, including: receiving configuration information for configuring a power saving channel for the user equipment UE from a base station, the power saving channel based on a physical downlink control channel PDCCH; The received configuration information determines whether the power saving channel is a UE-specific PDCCH or a PDCCH common to a group of UEs; and if the power saving channel is a PDCCH common to a group of UEs, according to the received The configuration information determines the starting position of the information field of the user equipment UE in the downlink control information DCI of the power saving channel and the number of bits occupied by the information field in the downlink control information DCI of the power saving channel.

In the above method performed by the user equipment UE, it is preferable that if the configuration information contains the power-saving wireless network temporary identification ps-RNTI, the ps-RNTI is used to scramble the cyclic redundancy calibration of the power-saving channel. Check CRC.

In the above method executed by the user equipment UE, it is preferable to determine whether the power saving channel is a PDCCH common to a group of UEs or not according to whether the configuration information contains the power saving wireless network temporary identifier ps-RNTI UE-specific PDCCH, if the configuration information contains the power-saving wireless network temporary identifier ps-RNTI, the power-saving channel is a group of UE-common PDCCHs, if the configuration information does not contain the power-saving wireless network If the ps-RNTI is temporarily identified, the power saving channel is a UE-specific PDCCH.

In the above method executed by the user equipment UE, preferably, the power saving channel is determined according to the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel Is it a PDCCH common to a group of UEs or a UE-specific PDCCH, if the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel is less than or less than or equal to a fixed value, then The power saving channel is a PDCCH common to a group of UEs, and if the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel is greater than or equal to or greater than the fixed value, Then the power saving channel is a UE-specific PDCCH.

In the above method executed by the user equipment UE, preferably, if the power saving channel is a PDCCH common to a group of UEs, the configuration information includes the information field used to indicate that the user equipment UE is in The power saving index number ps-Index of the starting position in the downlink control information DCI of the power saving channel.

In the above method executed by the user equipment UE, preferably, assuming that the number of bits occupied by the information domain of the user equipment UE in the downlink control information DCI of the power saving channel is N bits, the The bit positions occupied by the information domain of the user equipment UE in the DCI of the power saving channel are ps-Index, ps-Index+1,..., ps-Index+(N-1), where N Is a positive integer.

In the above method performed by the user equipment UE, it is preferable to assume that the effective load of the DCI of the power saving channel is M bits, and if ps-Index+(N-1)>M-1, then the user The configuration information configured by the device UE for the power saving channel is invalid, where M is a positive integer.

According to another aspect of the present invention, there is provided a user equipment including: a processor; and a memory storing instructions; wherein the instructions are executed according to any one of claims 1 to 7 when run by the processor. The method described in the item.

According to the method executed by the user equipment UE and the user equipment involved in the present invention, the problems such as the configuration and realization of the power saving signal or channel based on the PDCCH can be solved.

Description of the drawings

The above and other features of this application will become more apparent through the following detailed description in conjunction with the accompanying drawings, among which:

Fig. 1 shows a flowchart of a method executed by a user equipment UE according to an embodiment of the present application.

Fig. 2 shows a block diagram of a base station 100 according to an embodiment of the present application.

Fig. 3 shows a block diagram of a user equipment 200 according to an embodiment of the present application.

Fig. 4 shows a schematic diagram of a DRX cycle involved in an embodiment of the present application.

FIG. 5 shows a schematic diagram of UE multiplexing according to Embodiment 2 of the present application.

FIG. 6 shows a schematic diagram of UE multiplexing according to Embodiment 3 of the present application.

Detailed ways

The application will be described in detail below in conjunction with the drawings and specific implementations. It should be noted that this application should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies that are not directly related to the present application are omitted to prevent confusion on the understanding of the present application.

In step S101, the configuration information for configuring the power saving channel for the user equipment UE is received from the base station, and the power saving channel is based on the physical downlink control channel PDCCH.

In step S102, it is determined whether the power saving channel is a UE-specific PDCCH or a PDCCH common to a group of UEs according to the received configuration information.

In step S103, if the power saving channel is a PDCCH common to a group of UEs, it is determined according to the received configuration information that the information field of the user equipment UE is in the downlink control information DCI of the power saving channel. The starting position and the number of bits occupied by the information field in the downlink control information DCI of the power saving channel.

Fig. 2 shows a block diagram of a base station 100 according to an embodiment of the present application. As shown in the figure, the base station 100 includes a configuration unit 110 and a sending unit 120. Those skilled in the art should understand that the base station 100 may also include other functional units necessary to realize its functions, such as various processors, memories, radio frequency signal processing units, baseband signal processing units, and other physical downlink channel transmission processing units. However, for simplicity, detailed descriptions of these well-known elements are omitted.

The configuration unit 110 uses physical layer signaling and/or media access control (MAC: Media Access Control) signaling and/or RRC signaling and/or system information (SI: System Information) to configure power saving signals or channel. The sending unit 120 uses a physical downlink control channel and/or a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) to send the foregoing configuration information to the UE.

Fig. 3 shows a block diagram of a user equipment UE 200 according to an embodiment of the present application. As shown in the figure, UE 200 includes an extraction unit 210 and a receiving unit 220. Those skilled in the art should understand that the UE 200 may also include other functional units necessary to realize its functions, such as various processors, memories, radio frequency signal processing units, baseband signal processing units, and other physical uplink channel transmission processing units. However, for simplicity, detailed descriptions of these well-known elements are omitted.

The extracting unit 210 is for the UE to extract the configuration information about the power saving signal or channel sent by the base station from the received physical layer signaling and/or MAC signaling and/or RRC signaling and/or system information. The receiving unit 220 receives the configuration information sent by the base station through the physical downlink control channel and/or the physical downlink shared channel.

The base station described in the present invention is an entity used to communicate with user equipment, and may also refer to a Node B or an evolved Node B (Evolved Node B, eNB) or a gNB (Next generation Node B) or an access point (Access Point, AP). ).

The user equipment described in the present invention may also refer to a terminal or an access terminal or a station or a mobile station. The user equipment can be a cellular phone or a PDA (Personal Digital Assistant, PDA), a cordless phone, a notebook computer, a mobile phone, a smart phone, a handheld device, or a netbook, etc.

The physical downlink control channel described in the present invention may refer to the PDCCH in 3GPP LTE/LTE-A (Long Term Evolution/Long Term Evolution-Advanced) or 5G NR (New Radio) or MPDCCH (MTC PDCCH) for machine communication Or NPDCCH for narrowband IoT communications. The physical downlink shared channel may refer to PDSCH in 3GPP LTE/LTE-A (Long Term Evolution/Long Term Evolution-Advanced) or 5G NR, or NPDSCH for narrowband Internet of Things communication.

Different embodiments can also work together.

Introduction to discontinuous reception DRX

Packet-based data streams are usually bursty, with data transmission for a period of time, but no data transmission for a longer period of time. When there is no data transmission, the power consumption can be reduced by stopping receiving the PDCCH (the blind PDCCH detection will be stopped at this time), thereby increasing the battery life.

The basic mechanism of DRX is to configure a DRX cycle for the UE in the RRC_CONNECTED state. As shown in Figure 4, DRX cycle consists of "On Duration" and "Opportunity for DRX". During the "On Duration" time, the UE monitors and receives the PDCCH (active period); during the "Opportunity for DRX" time, the UE does not receive the PDCCH to reduce power consumption (sleep period).

Hereinafter, specific examples and embodiments related to the present disclosure will be described in detail. In addition, as described above, the examples and embodiments described in this disclosure are illustrative descriptions for easy understanding of the present invention, and do not limit the present invention.

Example 1

In Embodiment 1, as an example, the configuration and confirmation mechanism of the power saving channel are described.

The power-saving process based on the physical downlink control channel to achieve power-saving mainly refers to the base station according to the UE's channel status, service, etc., through the downlink control information (Downlink Control Information, DCI) carried by the physical downlink control channel to instruct the UE to adjust the relevant Parameters to reduce energy consumption. The physical downlink control channel used for power saving may be a UE-specific physical downlink control channel, or a group common physical downlink control channel. The UE-specific physical downlink control channel means that the physical channel is only used for a specific UE, and the downlink control information it carries only contains the information of the user. The cyclic redundancy check of the physical downlink control channel (Cyclic Redundancy Check) Check, CRC) can be scrambled with the UE’s Cell-Radio Network Temporary Identifier (C-RNTI), or it can be used as a certain wireless network temporary identifier configured for the physical downlink control channel for power saving For scrambling, the UE-specific Power Saving (PS) physical downlink control channel is also called UE-specific PS-PDCCH, or UE-specific PS DCI, or UE-specific DCI, etc. The power-saving physical downlink control channel common to a group of UEs can be used for more than one UE or multiple UEs. The downlink control information it carries includes control information of one or more UEs. The cyclic redundancy calibration of the physical downlink control channel The CRC (Cyclic Redundancy Check) is scrambled with the wireless network temporary identifier or the power-saving wireless network temporary identifier configured for the physical downlink control channel for power saving. A group of UE’s common power-saving physical downlink control channels is also called a group. Public power-saving physical downlink control channel Group Common PS-PDCCH, or Group Common PS-DCI, or Group Common DCI, etc.

The power-saving channel based on the physical downlink control channel can be considered together with the Connected-Discontinuous Reception (C-DRX) or separately. When considered together with C-DRX, the power saving channel based on the physical downlink control channel is before the "on duration" of the C-DRX cycle, and there is a time offset from the start time position of the "on duration" of the C-DRX cycle. Shift. For the UE, the power-saving channel based on the physical downlink control channel can play a wake-up role, that is, when the UE detects the power-saving channel based on the physical downlink control channel, the UE will monitor and receive the PDCCH and/or PDCCH for scheduling. Reference signaling and/or other physical channels and/or other signaling, and when the UE does not detect the power saving channel based on the physical downlink control channel, the UE will not monitor the PDCCH and/or reference signal for scheduling And/or other physical channels and/or other signaling. When considered separately, the power-saving channel based on the physical downlink control channel will not be restricted by C-DRX, that is, whether C-DRX is configured does not affect the work of the power-saving PDCCH. The DCI of the power-saving physical downlink control channel may contain a variety of control information to activate various power-saving mechanisms or technologies. For example, the DCI of the power-saving physical downlink control channel may contain one or more of the following control information: wake-up indication, sleep-in indication, cross-slot scheduling indication, start reference signaling transmission indication, start channel quality indicator CQI report, Single cell/multi-cell operation instructions, etc. The following is an example of power saving PDCCH configuration (PS-PDCCH-Config).

PS-PDCCH-Config information element

The PS-PDCCH-Config configuration contains parameters ps-RNTI, ps-Index, ps-DCI-field, etc. The ps-RNTI is a power-saving wireless network temporary identifier configured for the power-saving PDCCH, and is used to scramble the CRC of the power-saving PDCCH. The parameter ps-RNTI is optional, that is to say, the parameter ps-RNTI can be configured or not. ps-Index is a power saving index number, which is used to indicate the start bit position of the information field of the UE in the DCI of the group common PDCCH or the index number of the UE sorting of the information field of the UE in the DCI of the group common PDCCH. The ps-DCI-field is the information field of the UE in the DCI of the group public PDCCH. It is used to configure various power saving mechanisms or technologies for the UE. The size of the field is configurable or is determined by the various power saving mechanisms or It is determined by the number of technologies and/or the number of bits required for various power-saving mechanisms or technical instructions. The information field refers to a continuously distributed bit area in the DCI of the group common PDCCH by the UE. The ps-DCI-field in the example contains parameters Wakeup, Go-to-sleep, Cross-slot scheduling, etc. Among them, the parameter Wakeup is a wake-up indication, the parameter Go-to-sleep is an indication of entering sleep, and Cross-slot scheduling is an indication of cross-slot scheduling. The parameters Wakeup, Go-to-sleep, and Cross-slot scheduling configured for the ps-DCI-field in the example indicate the bit length of the parameters, and the bit information content of the information field is indicated by the DCI of the PS-PDCCH.

The configuration method of PS-PDCCH-Config can be physical layer signaling and/or media access control (MAC: Media Access Control) signaling and/or UE-specific radio resource control (RRC: Radio Resource Control) signaling and/or Or public RRC signaling and/or system information (SI: System Information), or any combination of the above multiple configuration methods.

For the UE, whether the power-saving physical downlink control channel is UE-specific PS PDCCH or Group Common PS-PDCCH can be determined by the configuration of ps-RNTI. If ps-RNTI is configured, Group Common PS-PDCCH or Group Common DCI is used, and the CRC of PS-PDCCH is scrambled by the configured ps-RNTI; if ps-RNTI is not configured, UE-specific PS PDCCH or UE is used -specific DCI, the CRC of the PS-PDCCH is scrambled by the C-RNTI of the UE.

Alternatively, whether the power-saving physical downlink control channel is UE-specific PS PDCCH or Group Common PS-PDCCH can be determined by the size of the configured ps-DCI-field, that is, by the number of bits occupied by the ps-DCI-field Decided. If the number of bits of ps-DCI-field is less than (or less than or equal to) P, then Group Common PS-PDCCH or Group Common DCI is used, and the CRC of PS-PDCCH is scrambled by the configured ps-RNTI; if ps-DCI-field If the number of bits is greater than or equal to (or greater than) P, UE-specific PS PDCCH or UE-specific DCI is adopted. At this time, if ps-RNTI is configured, the CRC of PS-PDCCH is scrambled by the configured ps-RNTI. If the ps-RNTI is not configured, the CRC of the PS-PDCCH is scrambled by the C-RNTI of the UE. Among them, the P value can be pre-defined, or it can be made by media access control (MAC: Media Access Control) signaling and/or UE-specific radio resource control (RRC: Radio Resource Control) signaling and/or public RRC signaling And/or system information (SI: System Information) configuration.

Alternatively, the UE does not distinguish or judge whether the PS-PDCCH is UE-specific PS PDCCH or Group Common PS-PDCCH, but selects the CRC scrambled radio network temporary identifier of the PS-PDCCH according to whether the ps-RNTI is configured (RNTI). If the ps-RNTI is configured, the CRC of the PS-PDCCH is scrambled by the configured ps-RNTI, and if the ps-RNTI is not configured, the CRC of the PS-PDCCH is scrambled by the C-RNTI of the UE.

Example 2

In Embodiment 2, as an example, a case where UEs with the same information field size are multiplexed in the same Group Common DCI will be described.

PS-PDCCH-Config information element

The PS-PDCCH-Config configuration contains parameters ps-RNTI, ps-Index, ps-DCI-field, etc. The ps-RNTI is a power-saving wireless network temporary identifier configured for the power-saving PDCCH, and is used to scramble the CRC of the power-saving PDCCH. The parameter ps-RNTI is optional, that is to say, the parameter ps-RNTI can be configured or not. ps-Index is a power saving index number, which is used to indicate the start bit position of the information field of the UE in the DCI of the group common PDCCH or the index number of the UE sorting of the information field of the UE in the DCI of the group common PDCCH. The ps-DCI-field is the information field of the UE in the DCI of the group public PDCCH. It is used to configure various power-saving mechanisms or technologies for the UE. The size of the field is configurable or determined by the various power-saving mechanisms or technologies configured. It is determined by the number of technologies and/or the number of bits required for various power-saving mechanisms or technical instructions. The information field refers to a continuously distributed bit area in the DCI of the group common PDCCH by the UE. The ps-DCI-field in the example contains parameters Wakeup, Go-to-sleep, Cross-slot scheduling, etc. Among them, the parameter Wakeup is a wake-up indication, the parameter Go-to-sleep is an indication of entering sleep, and Cross-slot scheduling is an indication of cross-slot scheduling. The parameters Wakeup, Go-to-sleep, and Cross-slot scheduling configured for the ps-DCI-field in the example indicate the bit length of the parameters, and the bit information content of the information field is indicated by the DCI of the PS-PDCCH.

For Group Common PS-PDCCH or Group Common DCI, the information fields of multiple UEs will be multiplexed in the same DCI, and the size of the information fields of each UE in the same group may be the same or different. This embodiment describes the case where UEs with the same information field size are multiplexed in the same Group Common DCI.

The DCI size of the PS-PDCCH may also be referred to as the payload size of the DCI of the PS-PDCCH (payload size). For example, the DCI size of the PS-PDCCH or the payload size of the DCI of the PS-PDCCH is M bits, and M is a positive integer. That is to say, there are M bits in the DCI of the PS-PDCCH, and the M bits are numbered 0, 1, 2, 3,..., M-1. Only UEs with the same information field size can be multiplexed in the DCI of the same PS-PDCCH.

The DCI size M of the PS-PDCCH can be pre-defined, or through physical layer signaling and/or media access control (MAC: Media Access Control) signaling and/or UE-specific radio resource control (RRC: Radio Resource Control) The signaling and/or public RRC signaling and/or system information are configured.

Hereinafter, how to obtain the bit position occupied by the UE in the DCI of the PS-PDCCH is described in detail. For the case where UEs with the same information field size are multiplexed in the same Group Common DCI, there are the following two methods.

method one

The power saving index number ps-Index is used to indicate the index number of the UE sorting of the information field of the UE in the DCI of the group common PDCCH

Assuming that the size of the ps-DCI-field of a certain UE is N bits, the ps-Index is taken from {1, 2, 3,..., Q-1, Q}, Q=floor(M /N), the floor points to the bottom and it can also be considered that Q is the maximum number of UEs that can be multiplexed in the DCI of the PS-PDCCH, and N and Q are positive integers. Then the bit positions occupied by the UE in the DCI of the PS-PDCCH are (ps-Index-1)*N, (ps-Index-1)*N+1,..., (ps-Index-1)*N+( N-1).

The UE can obtain the configuration of the ps-DCI-field through the configuration information of PS-PDCCH-Config, that is, the size N of the information field of the UE can be obtained, and the index number used to indicate the UE ranking of the UE in the DCI of the group public PDCCH ps-Index. Then according to the size M of the DCI of the PS-PDCCH, the number of UEs Q that can be multiplexed with the DCI can be obtained, or the possible values of ps-Index {1, 2,..., Q-1, Q}, Q = floor(M/N). From this, the bit position occupied by the UE in the DCI of the PS-PDCCH (ps-Index-1)*N, (ps-Index-1)*N+1,..., (ps-Index-1)* can be obtained N+(N-1). If (ps-Index-1)*N+(N-1)>M-1, the PS-PDCCH-Config configuration information configured for the UE is considered invalid, that is, the configured configuration information is not available.

As shown in FIG. 5, the DCI size of the PS-PDCCH is 12 bits as an example for description. Only UEs with the same size of the information field can be multiplexed in the DCI of the same PS-PDCCH. Therefore, there are 6 DCI formats as shown in FIG. 5, that is, DCI formats with information field sizes N of 1, 2, 3, 4, 5, and 6 bits, respectively. The DCI format with information field size N of 1 bit can be multiplexed at most Q=floor(12/1)=12 UEs with information field size N of 1 bit; DCI format with information field size N of 2 bits can be multiplexed at most Use Q=floor(12/2)=6 UEs with an information field size of 2 bits; a DCI format with an information field size N of 3 bits, which can multiplex at most Q=floor(12/3)=4 information field sizes N is a 3-bit UE; the information field size N is a 4-bit DCI format, and up to Q=floor(12/4)=3 UEs with an information field size N of 4 bits; information field size N is 5 bits The DCI format can be multiplexed up to Q=floor(12/5)=2 UEs with information field size N of 5 bits, and the remaining 2 bits are not used; DCI format with information field size N of 6 bits, at most Q=floor(12/6)=2 UEs whose information field size N is 6 bits can be multiplexed.

Alternatively, in addition to the above 6 DCI formats, 6 DCI formats with the size N of the multiplexed information field of 7, 8, 9, 10, 11, and 12 bits, respectively, can also be defined. At this time, for the 6 DCI formats with the information field size N of 7, 8, 9, 10, 11, and 12 bits respectively, only one UE can be multiplexed in the DCI of the PS-PDCCH. The UE can obtain the configuration of the ps-DCI-field through the configuration information of the PS-PDCCH-Config, that is, obtain the size N of the information field of the UE, and then select the corresponding DCI format to receive the PS-PDCCH according to the size N of the information field.

Alternatively, the UE can obtain the configuration of the ps-DCI-field through the configuration information of PS-PDCCH-Config, that is, the size N of the information field of the UE can be obtained, and the UE used to indicate that the UE is in the DCI of the group common PDCCH The index number ps-Index for sorting. Then according to the size M of the DCI of the PS-PDCCH, the number of UEs Q that can be multiplexed with the DCI can be obtained, or the possible values of ps-Index {1, 2,..., Q-1, Q}, Q = floor(M/N). From this, it can be obtained that the bit positions occupied by the UE in the DCI of the PS-PDCCH are (ps-Index-1)*N, (ps-Index-1)*N+1,..., (ps-Index-1) *N+(N-1).

Way two

The power saving index number ps-Index is used to indicate the start bit position of the information field of the UE in the DCI of the group common PDCCH.

Assuming that the size of the information field ps-DCI-field of a certain UE is N bits, N is a positive integer, and the ps-Index is taken from {0, 1, 2, ..., M-1}. Then the bit positions occupied by the UE in the DCI of the PS-PDCCH are ps-Index, ps-Index+1,..., ps-Index+(N-1). If ps-Index+(N-1)>M-1, the PS-PDCCH-Config configuration information configured for the UE is considered invalid, that is, the configured configuration information is not available.

The UE can obtain the configuration of the ps-DCI-field through the configuration information of PS-PDCCH-Config, that is, the size of the information field of the UE can be obtained, and the starting bit position ps used to indicate the UE in the DCI of the group common PDCCH -Index. Thus, the bit positions ps-Index, ps-Index+1,..., ps-Index+(N-1) occupied by the UE in the DCI of the PS-PDCCH can be obtained. According to the DCI size M of the PS-PDCCH, it can be judged whether the PS-PDCCH-Config configuration information configured by the base station for the UE is valid, or it can be judged whether the PS-PDCCH-Config configuration information configured by the base station for the UE is valid Available.

Example 3

In Embodiment 3, as an example, a case where UEs with different information field sizes can be multiplexed in the same Group Common DCI is described.

The power-saving process based on the physical downlink control channel to achieve power-saving mainly refers to the base station according to the UE's channel status, service, etc., through the downlink control information (Downlink Control Information, DCI) carried by the physical downlink control channel to instruct the UE to adjust the relevant Parameters to reduce energy consumption. The physical downlink control channel used for power saving may be a UE-specific physical downlink control channel, or a group common physical downlink control channel. The UE-specific physical downlink control channel means that the physical channel is only used for a specific UE, and the downlink control information it carries only contains the information of the user. The cyclic redundancy check of the physical downlink control channel (Cyclic Redundancy Check) Check, CRC) can be scrambled with the UE’s Cell-Radio Network Temporary Identifier (C-RNTI), or it can be used as a certain wireless network temporary identifier configured for the physical downlink control channel for power saving For scrambling, the UE-specific Power Saving (PS) physical downlink control channel is also called UE-specific PS-PDCCH, or UE-specific PS DCI, or UE-specific DCI, etc. A power-saving physical downlink control channel common to a group of UEs can be used for more than one UE or multiple UEs, and the downlink control information it carries includes one or more UE control information, and the cyclic redundancy check of the physical downlink control channel (Cyclic Redundancy Check, CRC) scrambles with the wireless network temporary identification or power-saving wireless network temporary identification configured for the physical downlink control channel used for power saving. The power-saving physical downlink control channel common to a group of UEs is also called group common Power-saving physical downlink control channel Group Common PS-PDCCH, or Group Common PS-DCI, or Group Common DCI, etc.

PS-PDCCH-Config information element

The PS-PDCCH-Config configuration contains parameters ps-RNTI, ps-Index, ps-DCI-field, etc. The ps-RNTI is a power-saving wireless network temporary identifier configured for the power-saving PDCCH, and is used to scramble the CRC of the power-saving PDCCH. The parameter ps-RNTI is optional, that is to say, the parameter ps-RNTI can be configured or not. ps-Index is a power saving index number, which is used to indicate the start bit position of the information field of the UE in the DCI of the group common PDCCH or the index number of the UE sorting of the information field of the UE in the DCI of the group common PDCCH. The ps-DCI-field is the information field of the UE in the DCI of the group public PDCCH. It is used to configure various power saving mechanisms or technologies for the UE. The size of the field is configurable or is determined by the various power saving mechanisms or It is determined by the number of technologies and/or the number of bits required for various power-saving mechanisms or technical instructions. The information field refers to a continuously distributed bit area in the DCI of the group common PDCCH by the UE. The ps-DCI-field in the example contains parameters Wakeup, Go-to-sleep, Cross-slot scheduling, etc. Among them, the parameter Wakeup is a wake-up indication, the parameter Go-to-sleep is an indication of entering sleep, and Cross-slot scheduling is an indication of cross-slot scheduling. The parameters Wakeup, Go-to-sleep, and Cross-slot scheduling configured for the ps-DCI-field in the example indicate the bit length of the parameter, and the bit information content of the information field is indicated by the DCI of the PS-PDCCH.

For Group Common PS-PDCCH or Group Common DCI, the information fields of multiple UEs will be multiplexed in the same DCI, and the size of the information fields of each UE in the same group may be the same or different. This embodiment describes the case where UEs with different information field sizes can be multiplexed in the same Group Common DCI.

The DCI size of the PS-PDCCH may also be referred to as the payload size of the DCI of the PS-PDCCH (payload size). For example, the DCI size of the PS-PDCCH or the payload size of the DCI of the PS-PDCCH is M bits, and M is a positive integer. That is to say, there are M bits in the DCI of the PS-PDCCH, and the M bits are numbered 0, 1, 2, 3,..., M-1. UEs of different information field sizes can be multiplexed in the DCI of the same PS-PDCCH. The size of the reusable information field is 1, 2, 3, 4,..., M-1, and M bits. When the size of the information field configured by a certain UE of the DCI of the PS-PDCCH is M bits, at this time, only one UE can be multiplexed in the DCI of the PS-PDCCH.

Hereinafter, how to obtain the bit position occupied by the UE in the DCI of the PS-PDCCH is described in detail. For the case where UEs with different information field sizes are multiplexed in the same Group Common DCI, there is one of the following methods.

method one

The parameter ps-Index can be configured to any value in {0, 1, 2, 3, 4,..., M-1}. The UE can obtain the configuration of the ps-DCI-field through the configuration information of PS-PDCCH-Config, that is, the size of the information field of the UE can be obtained, and the starting bit position ps used to indicate the UE in the DCI of the group common PDCCH -Index. Then the bit positions occupied by the UE in the DCI of the PS-PDCCH are ps-Index, ps-Index+1,..., ps-Index+(N-1). If ps-Index+(N-1)>M-1, the PS-PDCCH-Config configuration information configured for the UE is considered invalid, that is, the configured configuration information is not available.

As shown in Fig. 6, taking the DCI size of the PS-PDCCH of 12 bits as an example for description, UEs of different information field sizes can be multiplexed in the DCI of the same PS-PDCCH. The size of the reusable information field is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 bits. When the information field size of a certain UE configured for the DCI of the PS-PDCCH is 12, at this time, only one UE can be multiplexed in the DCI of the PS-PDCCH. 4 UEs with information field sizes of 1, 2, 3, and 6 are multiplexed in the DCI of the PS-PDCCH in Figure 6(a); information is multiplexed in the DCI of the PS-PDCCH in Figure 6(b) 3 UEs with domain sizes of 7, 2 and 3 respectively; the DCI of the PS-PDCCH in Figure 6(c) multiplexed 3 UEs with information domain sizes of 9, 1 and 2 respectively. In addition to the combinations shown in the figure, there can be other various combinations, which are not shown here.

The parameter ps-Index can be configured to any value in {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}. It is assumed that the size of the parameter ps-DCI-field configured for a certain UE is N bits, that is, the size of the information field of the UE is N bits. Then the bit positions occupied by the UE in the DCI of the PS-PDCCH are ps-Index, ps-Index+1,..., ps-Index+(N-1). If ps-Index+(N-1)>11, the PS-PDCCH-Config configuration information configured for the UE is considered invalid, that is, the configured configuration information is not available.

The UE can obtain the configuration of the ps-DCI-field through the configuration information of the PS-PDCCH-Config, that is, the size N of the information field of the UE and the ps-Index index number can be obtained. Then according to ps-Index, ps-Index+1,..., ps-Index+(N-1), the corresponding bit information can be extracted from the DCI of the received PS-PDCCH. At the same time, according to the DCI size M of the PS-PDCCH, it can be judged whether the PS-PDCCH-Config configuration information configured by the base station for the UE is valid, or it can be judged whether the PS-PDCCH-Config configuration configured by the base station for the UE is valid. Whether the information is available.

Alternatively, the power saving index number ps-Index may be used to indicate the start bit position of the UE in the DCI of the group common PDCCH and the number of bits or bit length occupied, that is, the SLIV (Start and Lnegth Indicator Value) value. The meaning of each bit can be indicated by the UE's information field ps-DCI-field or other configurations.

All the above-mentioned embodiments can be implemented individually or in combination with one or more embodiments.

The configuration methods involved in all the above embodiments may be physical layer signaling and/or media access control (MAC: Media Access Control) signaling and/or radio resource control (RRC: Radio Resource Control) signaling and/or system Information (SI: System Information).

The method and related equipment of the present application have been described above in conjunction with preferred embodiments. Those skilled in the art can understand that the method shown above is only exemplary. The method of the present application is not limited to the steps and sequence shown above. The network nodes and user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for base stations or UEs. The various identifiers shown above are only exemplary rather than restrictive, and the present application is not limited to specific information elements as examples of these identifiers. Those skilled in the art can make many changes and modifications based on the teaching of the illustrated embodiment.

It should be understood that the foregoing embodiments of the present application can be implemented by software, hardware, or a combination of both software and hardware. For example, the various components inside the base station and user equipment in the above embodiment can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Device, application specific integrated circuit (ASIC), field programmable gate array (FPGA), programmable logic device (CPLD), etc.

In this application, "base station" refers to a mobile communication data and control switching center with larger transmission power and wider coverage area, including functions such as resource allocation and scheduling, data reception and transmission. "User equipment" refers to a user's mobile terminal, such as mobile phones, notebooks, and other terminal devices that can communicate with base stations or micro base stations wirelessly.

In addition, the embodiments of the application disclosed herein can be implemented on a computer program product. More specifically, the computer program product is a product that has a computer-readable medium on which computer program logic is encoded, and when executed on a computing device, the computer program logic provides related operations to implement The above technical solution of this application. When executed on at least one processor of the computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present application. Such settings of the present application are typically provided as software, code and/or other data structures set or encoded on computer-readable media such as optical media (e.g. CD-ROM), floppy disks or hard disks, or such as one or more Firmware or microcode on a ROM or RAM or PROM chip, or downloadable software images, shared databases, etc. in one or more modules. Software or firmware or such a configuration may be installed on a computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present application.

In addition, each functional module or each feature of the base station device and the terminal device used in each of the foregoing embodiments may be implemented or executed by a circuit, and the circuit is usually one or more integrated circuits. Circuits designed to perform the functions described in this specification can include general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC) or general-purpose integrated circuits, field programmable gate arrays (FPGA), or other Programming logic devices, discrete gates or transistor logic, or discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The general-purpose processor or each circuit described above may be configured by a digital circuit, or may be configured by a logic circuit. In addition, when advanced technologies that can replace current integrated circuits appear due to advances in semiconductor technology, the application can also use integrated circuits obtained by using such advanced technologies.

Although the application has been described above in conjunction with the preferred embodiments of the application, those skilled in the art will understand that various modifications, substitutions and changes can be made to the application without departing from the spirit and scope of the application. Therefore, this application should not be limited by the above-mentioned embodiments, but should be limited by the appended claims and their equivalents.

The program running on the device according to the present invention may be a program that enables the computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU). The program or the information processed by the program can be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.

A program for realizing the functions of each embodiment of the present invention can be recorded on a computer-readable recording medium. Corresponding functions can be realized by causing the computer system to read the programs recorded on the recording medium and execute these programs. The so-called "computer system" herein may be a computer system embedded in the device, and may include an operating system or hardware (such as peripheral devices). The "computer-readable recording medium" may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium storing a program dynamically for a short time, or any other recording medium readable by a computer.

Various features or functional modules of the devices used in the above-mentioned embodiments may be implemented or executed by circuits (for example, single-chip or multi-chip integrated circuits). Circuits designed to perform the functions described in this specification can include general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above-mentioned circuit can be a digital circuit or an analog circuit. In the case of new integrated circuit technologies that replace existing integrated circuits due to advances in semiconductor technology, the present invention can also be implemented using these new integrated circuit technologies.

As above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific structure is not limited to the above embodiment, and the present invention also includes any design changes that do not deviate from the gist of the present invention. In addition, various modifications can be made to the present invention within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. In addition, the components having the same effects described in the above embodiments may be substituted for each other.

Claims

A method executed by user equipment UE includes:

Receiving configuration information for configuring a power saving channel for user equipment UE from the base station, the power saving channel based on the physical downlink control channel PDCCH;

Determining whether the power saving channel is a UE-specific PDCCH or a PDCCH common to a group of UEs according to the received configuration information; and

If the power-saving channel is a PDCCH common to a group of UEs, determine the start position of the information field of the user equipment UE in the downlink control information DCI of the power-saving channel according to the received configuration information and The number of bits occupied by the information field in the downlink control information DCI of the power saving channel.
The method of claim 1, wherein:

If the configuration information contains the power-saving wireless network temporary identifier ps-RNTI, the ps-RNTI is used to scramble the cyclic redundancy check CRC of the power-saving channel.
The method of claim 1, wherein:

Judging whether the power saving channel is a PDCCH common to a group of UEs or a UE-specific PDCCH according to whether the configuration information contains the temporary power-saving wireless network identifier ps-RNTI,

If the configuration information contains the power-saving wireless network temporary identifier ps-RNTI, the power-saving channel is a PDCCH common to a group of UEs, and if the configuration information does not contain the power-saving wireless network temporary identifier ps-RNTI , The power saving channel is a UE-specific PDCCH.
The method of claim 1, wherein:

Judging whether the power saving channel is a group of UE-common PDCCH or a UE-specific PDCCH according to the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel,

If the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel is less than or less than a fixed value, the power saving channel is a PDCCH common to a group of UEs, if If the number of bits occupied by the information domain of the user equipment UE in the downlink control information DCI of the power saving channel is greater than or equal to or greater than the fixed value, the power saving channel is a UE-specific PDCCH.
The method of claim 1, wherein:

If the power saving channel is a PDCCH common to a group of UEs, the configuration information includes the starting position of the information field used to indicate the user equipment UE in the downlink control information DCI of the power saving channel The power saving index number ps-Index.
The method of claim 5, wherein:

Assuming that the number of bits occupied by the information field of the user equipment UE in the downlink control information DCI of the power saving channel is N bits, the information field of the user equipment UE is in the power saving channel The positions of bits occupied in the DCI are ps-Index, ps-Index+1,..., ps-Index+(N-1), where N is a positive integer.
The method according to claim 6, wherein:

Assuming that the effective load of the DCI of the power saving channel is M bits, if ps-Index+(N-1)>M-1, the configuration information for the user equipment UE to configure the power saving channel is invalid, where: M is a positive integer.
A user equipment including:

Processor; and

Memory, storing instructions;

Wherein, the instruction executes the method according to any one of claims 1 to 7 when executed by the processor.